From: Jeff Layton <jlayton@redhat.com>
Date: Thu, 19 Nov 2009 14:38:34 -0500
Subject: [cifs] fix memory leak in ntlmv2 hash calculation
Message-id: <1258641517-20756-8-git-send-email-jlayton@redhat.com>
Patchwork-id: 21440
O-Subject: [RHEL5.5 PATCH 07/10] BZ#500838: cifs: Memory leak in ntlmv2 hash
	calculation
Bugzilla: 500838
RH-Acked-by: Peter Staubach <staubach@redhat.com>

From: Alexander Strakh <strakh@ispras.ru>

(Upstream commit 1b3859bc9e20d764316346665fc93ecea2d2b176)

 in function calc_ntlmv2_hash memory is not released.
1. If in the line 333 we successfully allocate memory and assign it to
pctxt variable:
       pctxt = kmalloc(sizeof(struct HMACMD5Context), GFP_KERNEL);
then we go to line 376 and exit wihout releasing memory pointed to by pctxt
variable.

Add a memory  releasing for pctxt variable before exit from function
calc_ntlmv2_hash.

Signed-off-by: Alexander Strakh <strakh@ispras.ru>
Signed-off-by: Steve French <sfrench@us.ibm.com>

diff --git a/fs/cifs/cifsencrypt.c b/fs/cifs/cifsencrypt.c
index 7c98095..7efe174 100644
--- a/fs/cifs/cifsencrypt.c
+++ b/fs/cifs/cifsencrypt.c
@@ -373,6 +373,7 @@ calc_exit_2:
 	   compare with the NTLM example */
 	hmac_md5_final(ses->server->ntlmv2_hash, pctxt);
 
+	kfree(pctxt);
 	return rc;
 }